Catalyst Bancorp director buys shares at $17.755

A director reported purchases through both direct ownership and an IRA, with separate post-transaction share counts.

Available on EDGAR 11/06/2026 - 11:22 AM EST Accepted by SEC EDGAR 11/06/2026 - 11:22 AM EST

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Form Type

Rhea-AI Filing Summary

Kirk E. Kleiser, a director of Catalyst Bancorp, Inc. (CLST), purchased 714 common shares directly and 990 through an IRA on November 4, 2026, at $17.755 per share. Reported holdings afterward were 46,601 direct shares and 21,089 IRA shares; the direct total includes unvested shares granted under the issuer’s 2022 Recognition and Retention Plan and Trust Agreement. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Net Buyer: 1,704 shares

Net Buy 2 txns

Insider Kleiser Kirk E.

Role Director

Bought 1,704 shs ($30K)

Increase in Position 2.6%

Type	Security	Shares	Price	Value
Purchase	Common Stock ^{F1, F2, F3}	714	$17.755	$13K
Purchase	Common Stock	990	$17.755	$18K
Holding	Stock Option (Right to Buy) ^F4	--	--	--
Holding	Stock Option (Right to Buy) ^F5	--	--	--
Holding	Stock Option (Right to Buy) ^F6	--	--	--
Holding	Common Stock	--	--	--
Holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 46,601 shares (Direct); Common Stock — 21,089 shares (Indirect, By IRA); Stock Option (Right to Buy) — 8,993 contracts (Direct); Common Stock — 4,100 shares (Indirect, By Spouse in IRA); Common Stock — 900 shares (Indirect, By Spouse)

Holdings Before and After: Common Stock, 45,887 to 46,601 shares (Direct); Common Stock, 20,099 to 21,089 shares (Indirect, By IRA)

Footnotes (6)

F1. Includes 1,696 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that reflect the unvested portion of a grant amount originally covering 8,464 shares that commenced vesting 20% per year on September 1, 2023.
F2. Includes 847 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that reflect the unvested portion of a grant amount originally covering 1,058 shares that commenced vesting 20% per year on June 10, 2026.
F3. Includes 1,058 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that vest at 20% per year commencing on June 10, 2027.
F4. The options vest at a rate of 20% per year commencing on June 10, 2027.
F5. The options are vesting at a rate of 20% per year commenced on September 1, 2023.
F6. The options are vesting at a rate of 20% per year commenced on June 10, 2026.

Key Figures

Direct shares purchased: 714 shares IRA shares purchased: 990 shares Purchase price per share: $17.755 per share +5 more

8 metrics

Direct shares purchased 714 shares November 4, 2026

IRA shares purchased 990 shares November 4, 2026

Purchase price per share $17.755 per share Both purchases on November 4, 2026

Direct holdings after purchase 46,601 shares November 4, 2026; includes unvested plan shares

IRA holdings after purchase 21,089 shares November 4, 2026

Direct stock options 2,645 underlying shares; $15.96 exercise price Expire June 10, 2036

Direct stock options 4,232 underlying shares; $13.30 exercise price Expire September 1, 2032

Direct stock options 2,116 underlying shares; $12.08 exercise price Expire June 10, 2035

Key Terms

Recognition and Retention Plan and Trust Agreement, Stock Option (Right to Buy), unvested portion

3 terms

Recognition and Retention Plan and Trust Agreement financial

"Issuer's 2022 Recognition and Retention Plan and Trust Agreement"

Stock Option (Right to Buy) technical

"Stock Option (Right to Buy)"

unvested portion financial

"reflect the unvested portion of a grant amount originally covering 8,464 shares"

FAQ

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How many shares did a CLST director buy, and at what price?

Kirk E. Kleiser, a director, purchased 714 shares directly and 990 through an IRA on November 4, 2026; each transaction was at $17.755 per share. Reported holdings afterward were 46,601 directly and 21,089 in the IRA.

What stock options did CLST director Kirk E. Kleiser report?

He reported direct options for 2,645 shares at a $15.96 exercise price, expiring June 10, 2036, with vesting of 20% per year beginning June 10, 2027; 4,232 shares at $13.30, expiring September 1, 2032, with vesting of 20% per year beginning September 1, 2023; and 2,116 shares at $12.08, expiring June 10, 2035, with vesting of 20% per year beginning June 10, 2026.

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Form 4 Insider Transactions: What Each Field Means →

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Kleiser Kirk E.

(Last)

(First)

(Middle)

C/O CATALYST BANCORP INC

235 N COURT ST

(Street)

OPELOUSAS

LOUISIANA

70570

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Catalyst Bancorp, Inc. [ CLST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/04/2026		P		714	A	$17.755	46,601⁽¹⁾⁽²⁾⁽³⁾	D
Common Stock	11/04/2026		P		990	A	$17.755	21,089	I	By IRA
Common Stock								4,100	I	By Spouse in IRA
Common Stock								900	I	By Spouse

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$15.96							⁽⁴⁾	06/10/2036	Common Stock	2,645		2,645	D
Stock Option (Right to Buy)	$13.3							⁽⁵⁾	09/01/2032	Common Stock	4,232		4,232	D
Stock Option (Right to Buy)	$12.08							⁽⁶⁾	06/10/2035	Common Stock	2,116		2,116	D

Explanation of Responses:

1. Includes 1,696 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that reflect the unvested portion of a grant amount originally covering 8,464 shares that commenced vesting 20% per year on September 1, 2023.

2. Includes 847 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that reflect the unvested portion of a grant amount originally covering 1,058 shares that commenced vesting 20% per year on June 10, 2026.

3. Includes 1,058 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that vest at 20% per year commencing on June 10, 2027.

4. The options vest at a rate of 20% per year commencing on June 10, 2027.

5. The options are vesting at a rate of 20% per year commenced on September 1, 2023.

6. The options are vesting at a rate of 20% per year commenced on June 10, 2026.

	/s/ /s/ Kristy Doucet by P.O.A. for Kirk E Kleiser	11/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR